NDLI: Prey weight and overwhelming difficulty impact the choice of retrieval strategy in the Neotropical ant Gnamptogenys sulcata (F. Smith)

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Nest demographics and foraging behavior of Apterostigma collare Emery (Hymenoptera, Formicidae) provide evidence of colony independence

Prey weight and overwhelming difficulty impact the choice of retrieval strategy in the Neotropical ant Gnamptogenys sulcata (F. Smith)

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Sequence and RFLP analysis of the ITS2 ribosomal DNA in two Neotropical social bees, Melipona beecheii and Melipona yucatanica (Apidae, Meliponini)

Old comb for nesting site recognition by Apis dorsata? Field experiments in China

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Prey weight and overwhelming difficulty impact the choice of retrieval strategy in the Neotropical ant Gnamptogenys sulcata (F. Smith)

Content Provider	Springer Nature Link
Author	Daly Schveitzer, S. Beugn, G. Lachaud, J. P.
Copyright Year	2007
Abstract	By regulating both the choice between solitary or collective retrieval and the level of nestmate investment for heavy prey transport, individual hunters of the ant Gnamptogenys sulcata are able to increase the foraging efficiency of the whole society, despite the extremely small size of this elite group (1 –4 hunters per colony). Their predatory behavior changes according to the static (weight, size, shape) and dynamic (mobility, escape behaviors) characteristics of the prey. The behavioral sequences resemble those of other poneromorph ants, but palpation after the approach phase is absent, probably because of the swiftness of the attack. Hunting is always performed by solitary workers but, independently of prey type and mobility, small, light prey trigger solitary retrieval whereas large, heavy prey trigger collective retrieval. For intermediate prey weights (8.5 to 21 times the hunter’s weight), some variability in the strategy choice is encountered. Both static and dynamic factors are involved in assessing the difficulty of handling living prey as shown by the number of stings delivered by the hunter for prey immobilization. However, the lack of any stinging against already dead prey indicates that these factors must be uncoupled when selecting retrieval strategies. Prey weight has a major role in this choice. For a given prey size always triggering solitary retrieval, a two-fold increase in prey weight is sufficient to trigger collective transport. Conversely, for a given prey size always triggering collective retrieval, a decrease in prey weight can trigger solitary transport. Moreover, presenting hunters with prey of “infinite” weight triggers several waves of recruitment, so that the number of recruited workers compensates for the “apparent” prey weight. Despite the inability to finely match the number of recruits to the weight of retrieved prey, recruitment strategies adopted by G. sulcata may reflect an evolutionary primitive step towards the finely graded recruitment behavior observed in closely related poneromorph species.
Starting Page	319
Ending Page	328
Page Count	10
File Format	PDF
ISSN	00201812
Journal	Insectes Sociaux
Volume Number	54
Issue Number	4
e-ISSN	14209098
Language	English
Publisher	SP Birkhäuser Verlag Basel
Publisher Date	2007-07-02
Publisher Place	Basel
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Predatory behavior graded recruitment prey weight effect decision-making Ectatomminae Zoology
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics Insect Science

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Erratum to: Biogeography, cryptic diversity, and queen dimorphism evolution of the Neotropical ant genus Ectatomma Smith, 1858 (Formicidae, Ectatomminae)

Prey weight and overwhelming difficulty impact the choice of retrieval strategy in the Neotropical ant Gnamptogenys sulcata (F. Smith)

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Prey weight and overwhelming difficulty impact the choice of retrieval strategy in the Neotropical ant Gnamptogenys sulcata (F. Smith)